Electric perforating-pen



(No Model.)

A. D. LEWIS.

ELECTRIC PBRFORATING PEN.

No. 516,212. Patented Mar. 13, 1894.

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UNITED STATES PATENT OFFICE.

AARON D. LEXVIS, OF CANTON, MISSOURI.

ELECTRIC PERFORATiNG-PEN.

SPECIFICATION forming part Of Letters Patent No. 516,212, dated March13, 1894.

Application filed July 15,1893. Serial No. l8O,6til- (N0 model.)

To all whom it may concern.-

Be it known that I, AARON D. LEWIS, a citizen of the United States,residing at Canton, in the county of Lewis and State of Missouri, haveinvented a new and useful Electric Perforating-Pen, of which thefollowing is a specification.

This invention relates to electric perforating pens; and it has for itsobject to provide certain improvements in electric perforating pensemployed for perforating and indenting the writing material beingwritten upon, such as drafts, checks and other commercial paper, wherebyalterations and erasures cannot be made without detection.

To this end the main and primary object of the present invention is toimprove upon the construction of electric perforating pens, whereby thesame are rendered much more useful and efficient.

With these and other objects in view which will readily appear as thenature of the invention is better understood the same consists in thenovel construction, combination and arrangement of parts hereinaftermore fully described, illustrated and claimed.

In the accompanying drawingsz Figure l is a perspective View of anelectric perforating pen constructed in accordance with this invention.Fig. 2 is a vertical central longitudinal sectional view thereof. Fig. 3is a detail transverse sectional View on the line x0c of Fig. 2. Fig. 4is an enlarged sectional View of the needle operating devices removedfrom the pen-holder casing. Fig. 5 is a simi lar view of the upper endof said devices. Fig. 6 is a detail plan view of the armature disk.

Referring to the accompanying drawings:- A represents a tubular hollowpen-holder having a lower shouldered end a, which re movably receivesone end of the hollow penholder tip 13, which tip accommodates in theouter end thereof the spring pen holding plug 0, between which and thepen holder tip B, is adapted to be inserted an ord nary pen point D. Thepen point D, is provided on its under side with the perforated guide lugE, the perforation of which is in a line with a guide perforation e,formed in the plug 0.

The pen holder A, is flared at one end as at F, and exteriorly threadedat f, at such end, to removably receive one interiorly threaded end ofthe cylindrical pen holder casing section G, which is interiorlythreaded at both ends and has a binding or set screw g, working in oneside thereof. The other interiorly threaded end of the casing G,removably receives the flared exteriorly threaded end of the tubularpen-holder extension cap H, which completely incloses the casing orbarrel G, and provides convenient means forinclosing the leading-inwires of the magnet devices to be presently described.

The cylindrical pen holder casing G, is adapted to snugly and removablyreceive the cylindrical magnet box I, which is held firmly in positionwithin the pen-holder casing by means of the binding or set screw g,clamping thereon. The magnet box I, is closed at one end and is providedwith a central opening 2', in such closed end, and said boxinclosestherein an ordinary electro magnet J. The electro magnet J, is thusentirely incased within a metallic box, which is itself held in positioninside of the hollow pen-holder, and said magnet is provided withalongitudinally perforated core K, one end of which is threaded as at70, to receive the perforated screw L passing through the centralperforation in one end of the magnet box I, and engaging the threadedend of the core of the magnet in order to securely hold the same inposition within the magnet box, and the latter is further provided in.one side with a wire groove L, which accommodates one of the magnetwires Z, which passes through a suitable perforation in the closed endof the magnet box, and forms a continuation of one of the leading-inwires on, which are disposed within the cap H, and are suitablyconnected in a battery circuit in the ordinary manner.

The electro-magnet J, is provided at one end thereof with the projectingguide pin M, which projects beyond the open end of the magnet box toloosely fit in the guide perforation m, in the vibrating armature diskN, which is arranged to vibrate overthe exposed end of the magnet coreand the open end of the magnet box, and is held steady in its vibrationby said guide pin, which also provides means for connecting the armaturediskv in circuit with the other magnet wire to provide for the propermake and break of the circuit. The armature disk N, is provided with acentral threaded opening at, which receives the inner threaded end ofthe reciproeating perforating needle 0, which works through thelongitudinally perforated core of the magnet and the perforated screw L.The said longitudinally reciprocating perforating needle 0, is guided toits work by the perforated plug 0 and lug E, and is provided at itsouter extremity with a perforating point 0, which vibrates directly backof the pen point, so as to indent or puncture the writing material asthe pen is carried thereover in the ordinary manner.

The vibrating armature disk N, is normally held off from the core of themagnet by means of the relieving coil spring P, arranged therebetweenand one end of the magnet, so as to relieve the disk from the magnetcore immediately upon the breaking of the circuit, and outside of andbeyond the armature disk is arranged an adjustable contact spring Q, thelower end of which is adapted to contact with the disk when the latteris held off from the magnet core by the relieving spring P. The contactspring Q, is attached to one end of the adjusting screw R, adjustable inand insulated from the off-standing bracket arm S, attached to one endof the magnet box I and disposed entirely within the cap H. The screw R,has attached thereto one of the leading-in wires w, in order to completethe circuit through the magnet and the armature disk during itsvibrations.

Now it will be readily apparent to those skilled in the art thatimmediately upon closing the circuit through the writing instrument justdescribed, the electro-magnet is rendered active so that its core atonce attracts the armature disk, and draws it away from the contactspring thereby reciprocating the perforating needle in one direction,and at the same time immediately breaking the circuit so that thearmature disk immediately flies back against the contact spring underthe tension of the relieving spring, so as to again close the circuitand cause the vibrations to continue. The employment of the springs atboth sides of the armature disk greatly assists the rapid Vibrationthereof.

Changes in the form, proportion, and the minor details of constructionmay be resorted to without departing from the principle or sacrificingany of the advantages of this invention.

Having thus described my invention, what rocating needle, and an uppertapered extension cap inclosing the leading-in wires and providing aproper length for the pen holder, said penholder sections beingdetachably joined together, substantially as set forth.

2. In an electric perforating pen, a hollow pen holder, the pen pointhaving a guide lug on its under side, an electro magnet removablymounted inside of the hollow'pen holder and having a vibrating armature,springs arranged at both sides of said armature and one of which isincluded in the electric circuit, and a longitudinally reciprocatingneedle removably attached at one end to the magnet armature and workingin a direct line with the pen point, substantially asset forth.

3. In an electric perforating pen, the'sectional hollow pen holderconsisting of opposite exteriorly threaded tubular portions and anintermediate enlarged cylindrical casing removably receiving the ends ofsuch 'opposite portions, the pen point inserted in one end of the penholder, an electro magnet removably clamped in position inside of thepen holder casing and having a vibrating armature, the leading-in wiresinclosed within one end of the holderand connected with the magnetdevices, and a longitudinally reciprocating perforating needle connectedatone end to the magnet armature and adapted to have its other endvibrate beneath and beyond the pen point, substantially'as set forth.

4. In an electric perforating pen, a hollow pen holder having acentrally disposed cylindrical casing, the pen point having a guide lugon its under side, a cylindrical magnet box removably clamped inposition within the pen-holder casing, an electro magnet similarly heldin position within the magnet box, a vibrating armature disk arranged atone end of the magnet box and the magnet therein, circuit connections,and a reciprocating perforating needle having a perforating point at oneend working through the pen point guide lug and attached at its otherend to the armature disk, substantially as set forth.

5. In an electric perforating pen, a hollow pen holder having acylindrical casing in a line with the body thereof, a cylindrical magnetbox closed and perforated at one end and adapted to be removably clampedwithin the pen holder casing, an electro-magnet mounted within themagnet box and having a perforated core threaded at one end, aperforated screw passing through the perforated end of the magnet boxand engaging the threaded end of the magnet core,a vibrating armaturedisposed at one end of the magnet box, circuit connections, and alongitudinally reciprocating perforating needle working through theperforated magnet core and the perforated screw and attached at itsinner end to the armature disk, substantially as set forth.

6. In an electric perforating pen, ahollow pen holder having acylindrical casing,a cylindrical magnet box adapted to be clamped insideof said casing, and having a longitudinally perforated core, and a guidepin at one end, a vibrating armature disk disposed at one end of themagnet box and having a perforation loosely moving over said guide pin,a relieving spring arranged between the armature disk and the magnet, anoil-standing bracket arm attached to one end of the magnet box, acontact spring adjustably held 01f from said bracket arm and disposed atone side of the armature disk, circuit connections, the pen point, andthe longitudinally reciprocating perforating needle removably attachedat one end to said vibrating armature, substantially as set forth.

In testimony that I claim the foregoing as my ownI have hereto affixedmysignaturein the presence of two witnesses.

AARON D. LEWIS.

Witnesses:

B. H. SMITH, J AS. E. OLDHAM.

